Definition

1. Noun:
   • A sinus of the meatuses of the nasal cavity (behind the bridge of the nose): The ethmoid sinus refers to a collection of small, air-filled cavities located within the ethmoid bone, a delicate bone situated between the eyes and behind the nasal bridge. These sinuses are part of the paranasal sinus system.

Usage Examples

• Noun:
  • Chronic inflammation can affect the ethmoid sinus.
  • The CT scan revealed an infection in the ethmoid sinus.
  • Surgery may be required to drain a blocked ethmoid sinus.

Advanced Usage

• "Ethmoid sinusitis": Inflammation or infection specifically of the ethmoid sinuses.
  • Her headache was diagnosed as a case of acute ethmoid sinusitis.

Variants and Related Words

• Ethmoidal sinus (n): An alternative term for ethmoid sinus.
  • The ethmoidal sinus is divided into anterior and posterior groups.
• Ethmoid bone (n): The bone that houses the ethmoid sinuses.
  • The cribriform plate is part of the ethmoid bone.

Synonyms

• Ethmoidal air cells: A more detailed anatomical term for the ethmoid sinus cavities.

Notes on Meaning

The term ethmoid sinus is primarily used in medical and anatomical contexts. It almost always refers to the specific anatomical structure and is not used metaphorically. The plural form, ethmoid sinuses, is commonly used as there are multiple small cavities.

Noun

1. a sinus of the meatuses of the nasal cavity (behind the bridge of the nose)